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rem:

rem  里面的r root 根元素  html文档根元素2.rem是基于根元素的字体大小来决定的

rem方式适配所有移动端设备
var 定义基准值 ">
    

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                    <h1>rem方式适配移动端设备</h1>
                    
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                            2016-10-30
                        
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                <p>em:<br>1.默认的字体大小是16px  是绝对的吗？不是，和浏览器设置有关系<br>2.em是基于父元素的字体大小来的  —-&gt;32px </p>
<p>rem:</p>
<ol>
<li>rem  里面的r root 根元素  html文档根元素<br>2.rem是基于根元素的字体大小来决定的</li>
</ol>
<p>rem方式适配所有移动端设备</p>
<p>var 定义基准值 如设计稿里的字体大小，移动端设备宽度集合等<br> base 基本样式重置和定义<br> mixin 定义适配方案的函数<br> adapter 调用函数<br> index 中引入所有less，写代码<br> <figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div><div class="line">19</div><div class="line">20</div><div class="line">21</div><div class="line">22</div><div class="line">23</div><div class="line">24</div><div class="line">25</div><div class="line">26</div><div class="line">27</div><div class="line">28</div><div class="line">29</div><div class="line">30</div><div class="line">31</div><div class="line">32</div><div class="line">33</div><div class="line">34</div><div class="line">35</div><div class="line">36</div><div class="line">37</div><div class="line">38</div><div class="line">39</div><div class="line">40</div><div class="line">41</div><div class="line">42</div><div class="line">43</div><div class="line">44</div><div class="line">45</div><div class="line">46</div><div class="line">47</div><div class="line">48</div><div class="line">49</div><div class="line">50</div><div class="line">51</div><div class="line">52</div><div class="line">53</div><div class="line">54</div><div class="line">55</div><div class="line">56</div><div class="line">57</div><div class="line">58</div><div class="line">59</div><div class="line">60</div><div class="line">61</div><div class="line">62</div><div class="line">63</div><div class="line">64</div><div class="line">65</div><div class="line">66</div><div class="line">67</div><div class="line">68</div><div class="line">69</div><div class="line">70</div><div class="line">71</div><div class="line">72</div><div class="line">73</div><div class="line">74</div><div class="line">75</div></pre></td><td class="code"><pre><div class="line"> var</div><div class="line">@baseColor :#123;</div><div class="line">@adapterDevice:320px,350px,360px,375px,384px,400px,414px,424px,450px,480px,540px,640px,720px,750px;</div><div class="line">@psdWidth:750;</div><div class="line">@basesize:100;</div><div class="line">@len:length(@adapterDevice);</div><div class="line"></div><div class="line">base</div><div class="line">/*====reset css===*/</div><div class="line">*,</div><div class="line">::before,</div><div class="line">::after&#123;</div><div class="line">  padding: 0;</div><div class="line">  margin: 0;</div><div class="line">  box-sizing: border-box;</div><div class="line">  -webkit-box-sizing: border-box;</div><div class="line">  -webkit-tap-highlight-color: transparent;</div><div class="line">&#125;</div><div class="line">body&#123;</div><div class="line">  font-size: 14px;</div><div class="line">  font-family: &quot;Microsoft YaHei&quot;,sans-serif;</div><div class="line">  color: #333;</div><div class="line">&#125;</div><div class="line">a&#123;</div><div class="line">  text-decoration: none;</div><div class="line">  color: #333;</div><div class="line">&#125;</div><div class="line">a:hover&#123;</div><div class="line">  color: #333;</div><div class="line">&#125;</div><div class="line">ul&#123;</div><div class="line">  list-style: none;</div><div class="line">&#125;</div><div class="line">input,textarea&#123;</div><div class="line">  border: none;</div><div class="line">  outline: none;</div><div class="line">  resize: none;</div><div class="line">  -webkit-appearance: none;</div><div class="line">&#125;</div><div class="line">/*====common css===*/</div><div class="line">.f_left&#123;</div><div class="line">  float: left;</div><div class="line">&#125;</div><div class="line">.f_right&#123;</div><div class="line">  float: right;</div><div class="line">&#125;</div><div class="line">.clearfix::before,</div><div class="line">.clearfix::after&#123;</div><div class="line">  content:&quot;&quot;;</div><div class="line">  display: block;</div><div class="line">  visibility: hidden;</div><div class="line">  height: 0;</div><div class="line">  line-height: 0;</div><div class="line">  clear: both;</div><div class="line">&#125;</div><div class="line"></div><div class="line">maxin</div><div class="line">//适配方案封装的方法</div><div class="line">.adapterFun(@index) when (@index&lt;=@len) &#123;</div><div class="line">  @media (min-width: extract(@adapterDevice,@index) ) &#123;</div><div class="line">    html &#123;</div><div class="line">      font-size: extract(@adapterDevice,@index)/@psdWidth*@basesize;</div><div class="line">    &#125;</div><div class="line">  &#125;</div><div class="line">.adapterFun(@index + 1);</div><div class="line">&#125;</div><div class="line"></div><div class="line">adapter</div><div class="line">.adapterFun(1);</div><div class="line"></div><div class="line">index </div><div class="line">@import &quot;var&quot;;</div><div class="line">@import &apos;base&apos;;</div><div class="line">@import &apos;maxin&apos;;</div><div class="line">@import &apos;adapter&apos;;</div></pre></td></tr></table></figure></p>


                
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